TBL GEN 2.1.1 FIG GEN 2.1.1
For Measurements of: Units used:
Distance used in navigation, position reporting, etc. . generally in excess of 2 to 3 nautical miles Nautical miles and tenths
Relatively short distances such as those relating to aerodrome (e.g., runway lengths) Feet
Altitudes, elevations and heights Feet
Horizontal speed, including wind speed Knots
Vertical speed Feet per minute
Wind direction for landing and taking off Degrees magnetic
Wind direction except for landing and taking off Degrees true
Visibility, including runway visual Statute miles or feet
Altimeter Setting Inches of mercury
Temperature Degrees Fahrenheit
Weight Pounds
Time Hours and minutes, the day of 24 hours beginning at midnight Coordinated Universal Time
GEN 2.2 Abbreviations Used in AIS Publications
NOTE.
An “s” may be added for plural. ICAO indicates ICAO usage.
A
/ and
AAS airport advisory service
A/C approach control
ICAO: AAP . approach control; AC . altocumulus
ACFT aircraft
ACR air carrier
ADF automatic direction finder
AER approach end runway
AFIS Automatic Flight Information Service
AFT after
AGL above ground level
AHRS Attitude Heading Reference System
AIM Aeronautical Information Manual
ALS approach light system
ALSF.1 standard 2400’ high.intensity approach lighting system with sequenced flashers (Category I configuration)
ALSF.2 standard 2400’ high.intensity approach lighting system with sequenced flashers (Category II configuration)
ALSTG altimeter setting
ALT altitude
ALTM altimeter
ALTN alternate
AMDT amendment
ICAO: AMD . amendment
APCH approach
APCHG approaching
APRX approximate
APV approve or approved or approval
ARPT airport
ICAO: AD . aerodrome
ARR arrive or arrival
ARSR air route surveillance radar
ARTCC air route traffic control center
ASDE airport surface detection equipment
ASPH asphalt
ATCT air traffic control tower
ATD along.track distance
ASR airport surveillance radar
ATIS automatic terminal information service
AVBL available
AWY airway
B
BC back course
BCN beacon
BCST broadcast
BLDG building
BRG bearing
BTN between
BYD beyond
C
CAT category
ICAO: CAT . clear air turbulence
CFR Code of Federal Regulations
CFR crash fire rescue
CLNC clearance
ICAO: CLR . clear/cleared to/clearance
CLSD close or closed or closing
CMSND commissioned
CNTR center
CNTRLN centerline
ICAO: CL . centerline
COMLO compass locator
CONST construction
CPTY capacity
CRS course
CTC contact
ICAO: CTR . control zone
D
ICAO: D . danger area
ICAO: D . downward (tendency in RVR during previous 10 minutes)
DALGT daylight
DCMSND decommissioned
DDT runway weight bearing capacity for aircraft with double dual.tandem type landing gear
DEGS degrees
ICAO: C . degrees Celsius (Centigrade) F . degrees Fahrenheit
DEP depart; departure
ICAO: DEP . depart/departure/departure message
DF direction finder
ICAO: DF . I am connecting you to the station you request
DH decision height
DME UHF standard (TACAN compatible dis-tance measuring equipment)
ICAO: DME . distance meaning equipment
DSPLCD displaced
DSTC distance
ICAO: DIST . distance
DT runway weight bearing capacity for aircraft with dual.tandem type landing gear
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